{"id":18320,"date":"2024-03-15T16:41:55","date_gmt":"2024-03-15T16:41:55","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/"},"modified":"2024-03-21T13:01:39","modified_gmt":"2024-03-21T13:01:39","slug":"how-to-pass-arrays-from-python-to-qt","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/","title":{"rendered":"How to pass arrays from Python to Qt?"},"content":{"rendered":"<p>There are multiple ways to call Python in Qt and pass arrays. Two common methods are described below:<\/p>\n<p>Option 1: Using QProcess to call a Python script.<\/p>\n<pre class=\"post-pre\"><code>QStringList arguments;\r\narguments &lt;&lt; <span class=\"hljs-string\">\"your_python_script.py\"<\/span> &lt;&lt; <span class=\"hljs-string\">\"arg1\"<\/span> &lt;&lt; <span class=\"hljs-string\">\"arg2\"<\/span> &lt;&lt; <span class=\"hljs-string\">\"...\"<\/span>;\r\n\r\nQProcess process;\r\nprocess.<span class=\"hljs-built_in\">start<\/span>(<span class=\"hljs-string\">\"python\"<\/span>, arguments);\r\nprocess.<span class=\"hljs-built_in\">waitForFinished<\/span>();\r\n\r\nQString output = process.<span class=\"hljs-built_in\">readAllStandardOutput<\/span>();\r\n<\/code><\/pre>\n<p>In a Python script, you can access passed arguments through sys.argv, where argv[0] is the script path, and the following arguments are the elements in the passed array.<\/p>\n<p>Option 1:<br \/>\nSecond method: Call Python functions using PyQt&#8217;s QPythonCallable.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QApplication&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QAxScript&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QAxObject&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;QDebug&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> argc, <span class=\"hljs-type\">char<\/span> *argv[])<\/span> <\/span>{\r\n    <span class=\"hljs-function\">QApplication <span class=\"hljs-title\">a<\/span><span class=\"hljs-params\">(argc, argv)<\/span><\/span>;\r\n\r\n    <span class=\"hljs-function\">QAxScript <span class=\"hljs-title\">engine<\/span><span class=\"hljs-params\">(<span class=\"hljs-string\">\"Python\"<\/span>)<\/span><\/span>;\r\n    engine.<span class=\"hljs-built_in\">setScript<\/span>(<span class=\"hljs-string\">\"your_python_script.py\"<\/span>);\r\n    engine.<span class=\"hljs-built_in\">start<\/span>();\r\n\r\n    QAxObject* function = engine.<span class=\"hljs-built_in\">globalObject<\/span>().<span class=\"hljs-built_in\">querySubObject<\/span>(<span class=\"hljs-string\">\"your_python_function_name\"<\/span>);\r\n    QVariantList arguments;\r\n    <span class=\"hljs-comment\">\/\/ \u5c06\u6570\u7ec4\u5143\u7d20\u52a0\u5165\u5230arguments\u4e2d<\/span>\r\n    arguments &lt;&lt; <span class=\"hljs-built_in\">QVariant<\/span>(<span class=\"hljs-number\">1<\/span>) &lt;&lt; <span class=\"hljs-built_in\">QVariant<\/span>(<span class=\"hljs-number\">2<\/span>) &lt;&lt; <span class=\"hljs-built_in\">QVariant<\/span>(<span class=\"hljs-number\">3<\/span>);\r\n    QVariant result = function-&gt;<span class=\"hljs-built_in\">call<\/span>(<span class=\"hljs-built_in\">QVariant<\/span>(arguments));\r\n    <span class=\"hljs-built_in\">qDebug<\/span>() &lt;&lt; result;\r\n\r\n    engine.<span class=\"hljs-built_in\">quit<\/span>();\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> a.<span class=\"hljs-built_in\">exec<\/span>();\r\n}\r\n<\/code><\/pre>\n<p>In a Python script, it is necessary to define a function that accepts an array as a callable object, for example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title function_\">your_python_function_name<\/span>(<span class=\"hljs-params\">arg_list<\/span>):\r\n    <span class=\"hljs-comment\"># \u5904\u7406\u6570\u7ec4<\/span>\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"result\"<\/span>\r\n<\/code><\/pre>\n<p>This method requires the use of QAxScript and adding QT += axcontainer in the .pro file.<\/p>\n<p>There are two common methods to invoke Python and pass an array, choose the appropriate one based on the specific situation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>There are multiple ways to call Python in Qt and pass arrays. Two common methods are described below: Option 1: Using QProcess to call a Python script. QStringList arguments; arguments &lt;&lt; &#8220;your_python_script.py&#8221; &lt;&lt; &#8220;arg1&#8221; &lt;&lt; &#8220;arg2&#8221; &lt;&lt; &#8220;&#8230;&#8221;; QProcess process; process.start(&#8220;python&#8221;, arguments); process.waitForFinished(); QString output = process.readAllStandardOutput(); In a Python script, you can access passed [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-18320","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to pass arrays from Python to Qt? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to pass arrays from Python to Qt?\" \/>\n<meta property=\"og:description\" content=\"There are multiple ways to call Python in Qt and pass arrays. Two common methods are described below: Option 1: Using QProcess to call a Python script. QStringList arguments; arguments &lt;&lt; &quot;your_python_script.py&quot; &lt;&lt; &quot;arg1&quot; &lt;&lt; &quot;arg2&quot; &lt;&lt; &quot;...&quot;; QProcess process; process.start(&quot;python&quot;, arguments); process.waitForFinished(); QString output = process.readAllStandardOutput(); In a Python script, you can access passed [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T16:41:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-21T13:01:39+00:00\" \/>\n<meta name=\"author\" content=\"Noah Thompson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Noah Thompson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/\"},\"author\":{\"name\":\"Noah Thompson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/2e83cc6ab9f60d36921c2d0f9f280f4a\"},\"headline\":\"How to pass arrays from Python to Qt?\",\"datePublished\":\"2024-03-15T16:41:55+00:00\",\"dateModified\":\"2024-03-21T13:01:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/\"},\"wordCount\":130,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-pass-arrays-from-python-to-qt\/\",\"name\":\"How to pass arrays from Python to Qt? 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